.loading{
  width: 100px;
  height: 100px;
  position: absolute;
  z-index: 100;
  top: 50%;
  left: 50%;
  margin-left: -50px;
  margin-top: -50px;
}
.loading span{
  display: inline-block;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: lightgreen;
  position: absolute;
  animation: load 1.04s ease infinite;
}

@keyframes load{
  0%{
      opacity: 1;
  }
  100%{
      opacity: 0.2;
  }
}
.loading span:nth-child(1){
  left: 0;
  top: 50%;
  margin-top:-8px;
  animation-delay:0.13s;
}
.loading span:nth-child(2){
  left: 14px;
  top: 14px;
  animation-delay:0.26s;
}
.loading span:nth-child(3){
  left: 50%;
  top: 0;
  margin-left: -8px;
  animation-delay:0.39s;
}
.loading span:nth-child(4){
  top: 14px;
  right:14px;
  animation-delay:0.52s;
}
.loading span:nth-child(5){
  right: 0;
  top: 50%;
  margin-top:-8px;
  animation-delay:0.65s;
}
.loading span:nth-child(6){
  right: 14px;
  bottom:14px;
  animation-delay:0.78s;
}
.loading span:nth-child(7){
  bottom: 0;
  left: 50%;
  margin-left: -8px;
  animation-delay:0.91s;
}
.loading span:nth-child(8){
  bottom: 14px;
  left: 14px;
  animation-delay:1.04s;
}

